mbox: Move mailbox build to point before other devices which will depend
on it.

(cherry picked from commit e22583514dd16165060ebbbfb1ac5ee69a84c7d4)
bcm2835: thermal: Add support for the BCM2835 on-chip thermal sensor.

Signed-off-by: Craig McGeachie <slapdau@yahoo.com.au>
(cherry picked from commit b0ce69dae0bb78bfd62603f18aaa8a58b66bf20f)
bcm2835: thermal: Enable BCM2835 thermal driver by default.
bcm2835: thermal: Fix checkpatch.pl errors.

(cherry picked from commit f69bcb828c7ff45ccea06289a2467103d8384b90)